McGill Environmental Systems is a biodegradable waste recycler and compost manufacturer with multiple facilities in the U.S. and Ireland.  

It builds and operates industrial-scale, indoor plants which utilize a scientifically-enhanced composting technology to recycle a wide variety of residuals and by-products from industrial, commercial, municipal and agribusiness customers. It also provides augmentation systems for bioenergy production and licenses its technology.

McGill manufactures about 370,000 cubic yards of compost annually and markets a line of premium compost products to professionals in the erosion control, turfgrass, agriculture, landscaping and landscape supply industries.  

It is also a participant in the U.S. Composting Council's Seal of Testing Assurance (STA) program and Consumer Use Program (CUP), as well as the U.S. Department of Agriculture's BioPreferred program.